Leviticus 23:25-28

²⁵ye shall not do any servile work therein, and ye shall offer burnt sacrifice to the Lord.

²⁶And the Lord spake to Moses, and said,

²⁷In the tenth day of this seventh month, the day of cleansings or purging shall be most solemn, and it shall be called holy; and ye shall torment your souls to God, and ye shall offer burnt sacrifice to the Lord;

²⁸ye shall not do any work in the time of this day, for it is the day of cleansing, that your Lord God be merciful to you.